Validated self-report methods of dietary assessment exist, and might be improved both in terms of accuracy and cost-efficiency with computer technology. The objectives of this preliminary study were to develop an initial version of an interactive CD-ROM program to estimate fruit, vegetable, and fat intake, and to compare it to multiple 24-hour dietary recalls (24HR; averaged over 3 days). In 2009, overweight male and female adults (N = 205) from Lane County, OR completed computerized and paper versions of fruit, vegetable, and fat screening instruments, and multiple 24HR. Summary scores from the ten-item NCI Fruit and Vegetable Scan (FVS) and the 18-item Block Fat Screener (BFS) were compared to multiple 24HR-derived fruit/vegetable and fat intake estimates (criterion measures). Measurement models were used to derive deattenuated correlations with multiple 24HR of paper and CD-ROM administrations of FVS fruit intake, FVS vegetable intake, FVS fruit and vegetable intake, and BFS fat intake. The computerized assessment and paper surveys were related to multiple 24HR-derived fruit/vegetable and fat intake. Deattenuated correlation coefficients ranged from 0.50 to 0.73 (all P ≤0.0001). The CD-ROM-derived estimate of fruit intake was more closely associated with the 24HR (r=0.73) than the paper-derived estimate (r=0.54; P<.05), but the other comparisons did not differ significantly. Findings from this preliminary study with overweight adults indicate the need for further enhancements to the CD-ROM assessment and more extensive validation studies.
Keywords: food portion estimation, fruit and vegetable intake, fat intake, overweight adults